array::operator

Article
12/01/2015

Accesses an element at a specified position.

Syntax

reference operator[](size_type off);
constexpr const_reference operator[](size_type off) const;

Parameters

off
Position of element to access.

Remarks

The member functions return a reference to the element of the controlled sequence at position off. If that position is invalid, the behavior is undefined.

Example

// std_tr1__array__array_operator_sub.cpp 
// compile with: /EHsc 
#include <array> 
#include <iostream> 

typedef std::array<int, 4> Myarray; 
int main() 
    { 
    Myarray c0 = {0, 1, 2, 3}; 

// display contents " 0 1 2 3" 
    for (Myarray::const_iterator it = c0.begin(); 
        it != c0.end(); ++it) 
        std::cout << " " << *it; 
    std::cout << std::endl; 

// display odd elements " 1 3" 
    std::cout << " " << c0[1]; 
    std::cout << " " << c0[3]; 
    std::cout << std::endl; 

    return (0); 
    }

0 1 2 3
1 3

Requirements

Header: <array>

Namespace: std